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Al-augite and Cr-diopside ultramafic xenoliths in basaltic rocks from western United States

Physics and Chemistry of the Earth

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Abstract

Ultramafic xenoliths in basalts from the western United States are divided into Al-augite and Cr-diopside groups. The Al-augite group is characterized by Al, Ti-rich augites, comparatively Fe-rich olivine and orthopyroxene, and Al-rich spinel, the Cr-diopside group by Cr-rich clinopyroxene and spinel and by Mg-rich olivine and pyroxenes. Both groups have a wide range of subtypes, but the Al-augite group is dominated by augite-rich varieties, and the Cr-diopside group by olivine-rich lherzolites. ?? 1975.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Al-augite and Cr-diopside ultramafic xenoliths in basaltic rocks from western United States
Series title:
Physics and Chemistry of the Earth
Volume
9
Issue:
C
Year Published:
1975
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
257
Last page:
272
Number of Pages:
16